Hmm. I'll see if I can dig up the posts I was referring to ~ but what it looked like to me, is that the majority of NPC sororities have policies against married women joining as new members. If that's no longer the case, I'm glad to hear it.
To my knowledge, AEPhi does not exclude married new members. My chapter has never had a married new member, though we have had an engaged new member, and several sisters (myself included) have gotten engaged while remaining active sisters. In fact, sisters who get engaged (in my chapter) are not given the option to become alumnae!
And I did ask specifically about fraternities and NPHC fraternities and sororities, as well as NPC sororities.